odoo_theme/theme_enark/views/snippets/s_call_to_action.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <template id="s_call_to_action" inherit_id="website.s_call_to_action">
        <!-- Paragraph -->
        <xpath expr="//h3" position="replace">
            <h3>As <b>436 clients</b> before you, let’s work together</h3>
        </xpath>
        <xpath expr="//p" position="replace"/>
    </template>
</odoo>